Fire-extinguisher



6.1. PEARsoNs.

FIRE EXTINGUISHER.

APPLICATION FILED SEPT.27, i916.

'Patented Aug. 30, 1921.

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H/S A TTORIVEY UNITED STATES GEORGE '.i. PEARsoNs, oF NEWYORK, N. Y.y

PATENT ,foFFicegjf y FIRE-EXTINGUISHER. Y f i To all whom it may concern.' u v Be it known thatI,l Geenen T. PEARsoNs, a citizen of the United States, residing in the borough of Manhattan, in ythe city, county, and Stateof New York, have iiivented' new and useful Improvements in Fire-Extinguishermof' which the following is a specilication. i

This invention relates to fireextinguishers of the syringe type in which a reservoir is provided with a `fire extinguishing liquid, such as carbon tetrachlorid, r a `composition of which carbon tetrachlorid forms a combreaking of the suction.

ponent part, and ywhich liquid is ejected from the reservoir by pu-mping mechanism within the reservoir, and it is the primary object ofthe invention to improve the general construction of extinguishers of this type to increase the efiiciency thereof.

In syringes of thisvtype havinga double acting. pumping-mechanism as the piston reachesthe end of itsl outwardand inward strokes and the motion of the piston is reversed there is a break inthe ejected stream due Yto the relieving of the pressure by the piston in the pumping cylinder and the The stream, ejected from the syringe must of necessity. be rela tively smalland ithasbeen found that due to this intermittent' breaking of the 4stream the lforce of the ejected streamV is materially reduced with lthe result that when the force. of the stream is again increased due to .the

lmovement of the piston the stream willnot penetrate the wall of heat varound a fire, andy this is especially so vshould the intensity of this heat wall be increased due to the spread-v ing of a lire, with the result that the efficiency of a syringe as a iirelextinguisher is greatly impaired. Itis an object of the present invention to overcome this disadvantage and provide van improved syringe in which the liquidbeing ejected is at all times underpressure and forcibly ejected with no breaks in and a consequent reduction in the force of the stream at any time during the operation of the syringe, and for which purpose there is provided a compression chamber or chambers into which the liquid is discharged :trom the piston chamber and ejected from said compression chamber or chambers under pressure. j

A'further object of the invention is VtoV Specification of Letters Patent. Patented flug, 30, 19,21 Application filed September 27, 1916. kSerial No. 122,324. I

Fig.- 3 is a detail view inperspective of one of the members to .lock the piston rod in position with the piston in` its `innermost position." Y Similar characters of reference designate like parts throughout the diiferent views vof. the drawing. j In the embodiment of my invention shown in the drawing there is provided a reservoir for a ireextinguishing liquid consisting of a tubular body portion l to] which are se` cured the ends5 and 5, said reservoir having a filler opening closed by Va plug 6 having a springiiifiuenced checkfvalve opening into and closing outward from thereservoir. VThe body portion has a contracted portion extending longitudinally thereof, as

at 7, to constitute a pump carrying chamber i and the large portion of the reservoir con stituting a liquid carrying chamber, thus providingthe reservoir with integral pump carrying and liquid carrying chambers.'

vA piston chamber is located in the contraoted portion of the reservoir consisting of a pair of heads 8 and 9, one head to lie n contiguousto each end of the reservoir, and a cylinder 10 connected at opposite ends to said heads. The head 8 has a part to engage in an openingin the reservoir end 5, as at 11, and the head 9 hasa cylindricalportion or sleeve 12 extendingthroughan opening in the reservoir end 5, and .the pump cham-y ber isfixed in position inthe/'reservoir Vby, soldering the head projections 11 and 12 to' the reservoir. Each of the heads Sand 9 has a projection 13, 14 extending laterally into the liquid carrying chamber with p orts 15, 16 in said head extensions to opposite ends of the cylinder 10,the ports having inlets 17 1 8 in apart of said head extensions coaxial with the axis of the liquid carrying chamber.

for a purpose to be hereinafter" describe@ Y midway the length thereof and is of less The piston chamber has an outlet 19 in the head 8 communicating with ancasing 20, which is in the nature of a com-pression chamber, and the latter chamber has an out let 21 in the head 8 to the exterior of the reservoir.

A' piston 22 having suitable packing isY reciprocable in the piston chamber by ahollow piston rod 23V extending through the head 9 and packing 24 retained in the sleeve portion 12 by a nut 25 to form a stuiing box and seal the piston rod, and the -rod has an operating handle 26 fixed thereto. The piston vrodhas ports 27 adjacent its inner end and the piston has free movement on the piston rod during the initial portion ofv its outward and inward movements between a pair of abutments 28, 29 fixed on the piston rod to control the opening and closing of v let 19 a second tube 31, said tube extending into the tube 3() to a point substantially diameter than the tube 30 to provide a space between the two and thus providing an air compression chamber within the tube 30.

To shut off communication between the tube 30 andthe piston chamber, and thereby the reservoir, to prevent leakage and evaporation of the liquid when the syringe is not in use the handle has in a recessed portion 32 therein a valve to engage with and close the end of the tube 30 when th-e piston is in its innermost position. This valve consists of a disk 33 of suitable material, such as cork, secured in a carrier 34 slidably mounted in the handle recess 32 and normally engages with an annular flange at the openingto the recess 32 by a. spring 35. To forcibly retain th-e valve in engagement with the end of tube 30 and lock the piston in its innermost position the piston rod has a projection 36 which is adapted to pass through a slot 37 (Fig. 3) ina member 38 engaging in and having a threaded connection with a tubular extension 39 on the nut 25, and the projection engaging with an inclined or cani face 40 at the inner end of said me1nber. The outlet 21 preferably is tapered as shown and has a tube 41 fixed 'therein to extend into the compression chamber 20.

To connect the piston chamber with the liquid in the lowermost part of the reservoir in all positions of the syringea tube 42 is connected at opposite ends with the inlets 17 and 18 to the ports of the pistonchamber and has a series of circumferentially. disposed ports 43 at a point between its ends, preferably centrally. A secondrtube 44 extending longitudinally of the liquid carrying chamber with its ends adj acent the side and opposite ends ofl said chamber is connected to the tube 42 through the ports 43 by coupling 45 through which `thet'ube 42 extends,rthe couplingbeing mounted upon the' tube 42 to permit-said coupling with the tube 44 to revolve about the tube 42 as an axis, and-whereby the tube 44 is adaptedto revolve in the VVliquid carrying chamber on an axis in line with the axis of said chamber. To prevent endwise movement of the coupling a pair ofcollars 46, 47 are fixed on the tube42 with felt orber washers interposed between the ends' of thecoupling and said collars.

V To shut offcommunication between one end of the tube 44 `and the reservoir whenv the other end of the .tube is connected to the reservoir, asl` for instance, to connect the end of the tube adjacent the end of the reservoir with the piston operating handle and shut ofi, the opposite Vends when the syringe is held in position with the outlet end ofthe pistouchamber tilted upward from the horizontal, a Lpair of valves4 are provided to cooperate with valveV 49 seats Y connected to or formed in the ends of the tube 44, said valves being'connected by a rod 50 extending ythrough and of greater length than the tube 44. The inlets toports land 1G are provided with check valves 15 and 16 opening into and closing outward from the piston chamber. A Y n The operation is substantially as follows, assuming the parts to be in ythe position shown in Fig. 1 with the piston rod locked in'position with theovalve 33 engagingwith andclosing the end of tube 34. The piston is first given a partial rotation to ,cause the projection 36 to register with the slot 37 in the locking member 38 when the piston rod is drawn outward and with it the piston, the piston during the initial movement of the rod having a slight movement thereon until it'engages ,with` the abutment 28 thereb v connecting thepiston chamber in back of the piston with the pistonv rod through the rodA ports 27 and forcing the Vliquid in the piston -chamberrin back of the piston into the piston rod and into the tube'30, and from saidtube through the tube 311 into the compression*chamber 2()V and from the latter through the outlet 21. Thepiston during this outward movement drawsfin liquid into the piston chamber in front of the piston through thefsuction inlet 15. During the initial portion of the inward movement of the piston rod the piston also has a slight free movement on Ythe piston rod until it engages with the yabutment 29 uncovering forced vthrough the piston rod'ports intoV the piston rod and through the tubesv 30,731

into chamber 2O and outthrough the outlet 21, the piston during this inward movement drawing liquid into the piston chamber in back of the piston through the suction Y inlet 16, when the operation is repeated'oluring the reciprocation' of the piston'. It' will be noted that the piston divides the piston cylinder into two chambers each of which chambers has a suction Vinletl connected to u the reservoir and which chambers are alterber 20.

nately connected with the outlet of the pistonfcylinder through the piston rod, tubes 30, 31 and the compression chamber formed therein, and through the compression cham- During the discharging of the liquid with the discharge end of the piston chamber tilted upward from the horizontal air will be pocketed between the tubes 30, 31, the said space between the tubes forming a compression chamber in which theair is compressed by the liquid in the tube 30 adjacent the open end of tube 31, and which air will serve to eject the liquid from the tube at all times, and especially during the time ythat the movement of the piston isreversedv with the result that va steady stream of substantially the sameforce is ejected at all times during the pumping operation. Should the discharge end ofthe piston chamber be tilted downward from the horizontal the liquid in the chamber 20 will pocket and compress theV air in the 'end of the chamber opposite to the outlet 21 withl the result thatk said air will also serve to eject the liquid in a steady stream at all times during the operation of the pumping invention, I

is connected having an outlet to the exterior ofthe reservoir for the purpose speciiied.

2. In a syringe, the combination of a reservoir to contain liquid; a piston cylinder in said reservoir; a piston to reciprocate in said cylinder; a hollow piston rod extending from one end of the piston cylinder and reservoir, said krod having ports controlled by the piston toconnect the interior ofthe purpose speciied.

piston rod with the piston` cylinder; a cham- Vber at the end of thepis'ton cylinder opposite to the end `from which the piston rod extends', saidchamberhaving an outlet to the exterior of the reservoir; anda tube" connected to said chamber eXtendinginto and spaced from the wall vof the piston rod A'and longitudinally of which tube the vpiston rod is movable and through which tube the liquid is'discharged during the reciprocation of thev piston rod-and'piston.

'3. In a syringe the combination of a reservoir havingga discharge outlet; a piston cylinder in said reservoir; a piston to reciprocate in said cylinder;- a hollow piston rod; a tube in the piston rod; and means to connect said tube with the dischargeoutlet' and provide a chamber between said tube and the outlet, substantially as and for the purpose specified.

4. In a syringe the combination of a reservoir; a piston cylinder in said reservoir; a piston to reciprocate in said cylinder; a` hollow.- piston rod; a fixed tube projecting into the piston rod; vand means to connect said tube with the discharge outlet chamber and provide a ,compression chamber within the tube, substantially as and for the purpose specified.

5. Ina syringe the combination of a res-` ervoir; a piston cylinder in said reservoir connected adjacent opposite endsl with the reservoir; a hollow piston rod havmgports;

a piston reciprocable by the rod in the `piston chamber and 'operable to control the opening and closing of the piston rod ports lto connect the piston rod with and discharge the liquid fromsaid cylinder from opposite sides of the piston into the piston rod; a iXed tube extending into the piston rod; and means to connect said tube with the `discharge outlet and provide chambers within the tube and between said means and the discharge outlet, substantially as and for the 6. In a syringe the combination of a reservoir; a pistonr cylinder 1n said reservoir Aconnected adjacent opposite ends" with the reservoir; a hollow piston rod having ports; a piston reciprocable by the rod in the piston cylinder and operable to control the opening` and closing ofthe piston rod portsjto connectthe piston rod with and discharge the liquidfrom the piston cylinder from opposite sides of the piston yinto the piston rod; a fiXedtube extending into the piston rod; a second tube extending intothe lirst tube discharge outlet; and means to connect said tube with the dischargeloutlet and provile chambers within the first tube and between the second tube and the discharge outlet of the piston chamber, substantially as and for thepurpose specified. v

7. In a'syringe the combination oi a reservoir; av piston cylinder in said reservoir having suction inlets connected to the reservoir; a chamber at one end ofsaid cylin-v der having an outlet to the exteriorvoi the reservoir; a piston to reciprocate in the cylinder; a hollow piston rod; and means to connect the cylinder through the piston rod with the chamber at the end of the cylinder, substantially as and i'or the purpose specified.' i

8. In asyringe the combination of a res,

ervoir; a piston cylinder in said reservoir having suction inlets connected to the reser-;

voir; a chamber at one end of thecylinder having an outlet to the exterior of the reservoir; a hollow piston rod having ports eX-.

ber at one end of the cylinder through the piston rod and tube, substantially as and for the purpose specilied. y

9. In a syringe the combination of a reservoir; a piston cylinder in said reservoir having a suction inlet connected to the reservoir; a chamber at one end ofthe cylinder having an outlet to the exterior of the reservoir; a hollow piston rod having ports extending from the end of the cylinder opposite to the end with the chamber; a tube connected to the inlet or" the chamber and eX- tending into thepiston rod; a pist-on reciprocable in the cylinder operable to control the opening and closing of the piston rod ports to connect the cylinder at opposite sides of the piston with the chamber at one end of the cylinder through the piston rod and tube; and a valve carried by the piston rod to cooperate with the tube when the piston is in its innermostposition tofshut off communication between said tube .and the cylinder; substantially as and for theY purhaving the chamber to adjacent the opposite end; meansto connect said tube with the chamber at the end of the cylinder and provide a chamber therein; and a piston reciprocable in the cylinder operable to control the opening and closing of the piston rod ports to connect the cylinder at opposite sides of the piston with the chamber at one end of the cylinder through the piston rod and tube, substantially as and for the purpose specified. 4

4llflnal syringe 4the combination of a reservoir; a piston 'cylinder in said reservoir having suction inlets connected to the reservoir; means connected to the suction inlets to connect the cylinder with the liquid in thelowermost part of the reservoir in all positions of the syringe; a chamber at one endof the cylinder having an outlet to the exterior of the reservoir; a hollow piston rod having. ports-extending from the l end of the cylinder opposite to the end with Y the chamber; an'operating handle connected to said extending end of the piston rod; a

,fixed tube extending from the end of the cylinder with the chamber to adjacent the operating handle of the piston rod; a second tube connected to the. chamber at one end of the cylinder and extending into the irst tube to connect the latter with said chamber and kprovidea compression chamber therein; a piston reciprocable in the cylinder operable to contr-ol the opening and closing of the piston rod ports to conneetV the cylinder at opposite sides of the piston with-thechamber at one end of the `cylinder' through the piston rod and tubes;

a valve Vcarrie-d by the-,pistonrod to cooperate-with the first tube to shut olf com- Inunicationr between said tube andthe cylinder when the piston is in its innermost position; and meansvcarried by the piston rod and cylinder to lock the piston rod in position with the piston in its innermost position7 substantially as and for the purings in the reservoirends, and aV cylinder connected atits ends to the cylinder heads; suction inlets in the heads to thejcylinder; a chamber in one head having an outlet to the exterior of the reservoir; a hollow piston r-od having portsv extending through the head opposite the head with the chamber; a tube connected to the chamber in the one head and extending into the piston rod; and a reciprocable piston operable to draw liquid from the reservoir tothe cylinder at opposite sides of the piston and control the opening-and closing ofthe piston 'rod ports to alternately connect the chamber in theone Vhead with the cylinderpat opposite-sides of the piston, substantially as and for the pur- -pose specified.

`each end of the reservoir, and a cylinder connected at opposite ends to said heads,

each of the heads having-apart extending laterally into the reservoir; ports in said head extensions communicating with-opposite ends of the cylinder and having inlets extending in line with the axis of the reservoir; an outlet in one of said heads to the exterior of the reservoir; a piston in the cylinder to separate the cylinder into two chambers; a hollow piston rod to reciprocate the piston; and means to alternately connect the chambers at opposite sides of the piston with the outlet through the piston rod, substantially as and for the purpose specified.

14. In a syringe the combination of a reservoir; a piston chamber in the reservoir located adjacent the side thereof comprising a pair of heads one head to lie contiguous to each end of the reservoir, and a cylinder connected at opposite ends with the heads, each of the heads having a part extending laterally into the reservoir; ports in said head extensions communicating with opposite ends of the cylinder and having inlets to extend in line with the axis of the reservoir; an outlet in one of said heads to the exterior of the reservoir; a tube extending longitudinally of the liquid carrying chamber rotatably connected to the inlets of the ports in the head extensions ,and revoluble on an axis in line with said ports; and piston mechanism to drawy liquid from the reservoir to the piston chamber at opposite sides of the piston and discharge said liquid through the outlet in the one head` of the p-iston chamber, substantially as and for the purpose specified.

' 15. In a syringe the combination of a reservoir; a piston chamber in the reservoir located adjacent the side wall comprising a pair of heads one head to lie contiguous to each end of the reservoir, and a cylinder connected at opposite ends to said heads, each of the heads having a part extending laterally into the reservoir; ports in` said head extensions communicating with opposite ends of the cylinder and having inlets extending in line with the axis of the reservoir; an outlet in one of the heads for the cylinder to the exterior of the reservoir; a tube connected at opposite ends to the inlets of the ports and having circumferentially disposed apertures at a point between its ends; an intake tube extending longitudinally or" the reservoir with its ends adjacent the side and opposite ends of said chamber; and means to revolubly support said tube on the rst tube and connect it with the circumferentially disposed apertures therein, substantially as and for the purpose specified.

16. In a syringe the combination with a reservoir; a piston chamber in the reservoir to lie contiguous to the side wall thereof having an outlet to the exterior of the reservoir and a part at each end extending laterally intothe liquid carrying chamber with ports therein to the cylinder; a tube connected at opposite ends to said ports extending longitudinallyfand in line with the axis of the reservoir, said tube having Icircum- -erentially disposed aperturesV at a point between its ends; an intake tube extending longitudinally of the reservoir with its ends adjacent the side and opposite ends of the reservoir;.means to revolubly support said tube on the first tube and connect it with the circumferentially disposed apertures therein; and valve mechanism to shut off communication between one end of the intake tube and the reservoir when the opposite end is connected thereto, substantially as and for the purpose specified. c

17. In a syringe the combination of a reservoir; a iston chamber in the reservoir located adjacent the side wall comprising a pair of heads one head to lie contiguous to each end of the reservoir, and a cylinder connected at opposite ends to the heads, each of the heads having a part to extend laterally into the reservoir; suction inlets in said 'head extensions to opposite ends of the cyl-V inder; an outlet in one of said heads to the exterior of the reservoir; a piston to reciprocate in the cylinder; a hollow piston rod to extend through the head opposite to the head having the outlet; a tube connected to the outlet extending into the`piston rod to adjacent the other end of the cylinder; and valve mechanism to control the entrance of liquid from the reservoir to the piston chamber at opposite sides of the piston and the ejecting of said liquid alternately from opposite ends of the piston, substantially as and for the purpose specified. l

18. In a syringethe combination'of a reservoir; a piston chamber therein fixed at opposite ends to the reservoir and having suction inlets at opposite ends connected to the reservoir; a casing at one end of said chamber with an outlet to the exterior of the reservoir; a piston to reciprocate in the iston chamber; a hollow piston rod extending from the end of the piston opposite to the casing; a tube connected at one end to the casing and extending into the piston chamber; and valve mechanism operable during the reciprocation4 of the piston to control the flow of liquid from the reservoir to the piston chamber at opposite sides of the piston and the ejecting of the liquid -`alternately from opposite sides of the pissaid extending end; a fixed tube extending into the piston rod from the end of the cylinder Yopposite to the operating handle; a piston to reciprocate in the cylinder and control the opening and closing of the piston rod ports to connect the piston rod With the cylinder at opposite sides of the piston;

means toeonnect the piston rod with the cylnder outlet and provide a compression chamber. in the fixed `tube; and a reservoir n whichY the cylinder is fixed at opposite ends, substantially as and for the vpurpose speced. A v v f GEO. T. PEARSONS. 

